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CONFIDENTIAL AS/APR 2006/BI0120

UNIVERSITI TEKNOLOGI MARAFINAL EXAMINATION

COURSECOURSE CODEEXAMINATIONTIME

INTRODUCTION TO BIOLOGYBIO120APRIL 20063 HOURS

INSTRUCTIONS TO CANDIDATES1. This question paper consists of two (2) parts PART A (20 Questions)PART B (7 Questions)

2. Answer ALL questions from all two (2) parts.i) Answer PAR T A in the Objective Answ er Sheet.ii) Ans wer PA RT B in the Ans wer Booklet. Start each answe r on a new page.

3. Do not bring any material into the examination room unless permission is given by theinvigilator.4. Please check to make sure that this exam ination pack consists of:

i) the Question Paperii) an Objective Answer Sheet - provided by the FacultyH i) an Answ er Booklet - provided by the Faculty

DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SOThis examination paper consists of 8 printed pages

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PART A (30 MARKS)

1. The characteristics of living organism include all of the following statements EXCEPTA. They ca n regulate their own metabolism processes by themselves.B. Reproduction process is important in order to maintain the survival ofgeneration.C. They move from one place to another and explore their surrounding.D. They compete with each other to get food and shelter in one confined area.

2. The brain is subject to theorganization.A. cellB. tissueC. organD. organism

level in the hierarchy of biological

3. Which of the following pairs is mismatched?A. Species - RocksB. Population - ElephantsC. Community - Animals and PlantsD. Ecosystem - Animals, Plants, Water, Soils and Atmosphere

4. Convert 0.05 mg into |ig.A.B.C.D.

5000500505

5. Sampling errors can be reduced whenA. the experiment is done with replication.B. the equipment used is not calibrated.C. the sample size is not put under consideration.D. the specimens used in the experiment are not typical.

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6. The strongest chemical bonds areA. Van de Waals interaction.B. covalent and ionic bonds.C. covalent and hydrogen bonds.D. ionic and hydrogen bonds.

7. The transportation of water in xylem tissues is supported by the property of the wateritself. Which of the following explains the above phenomenon?A. Versatile solvent.B. Adhesive and cohesive.C. High heat of vaporization.D. Expansion of molecules when its freeze.

8. What would be the pH of solution A if the concentration of hydroxide ion [OH"] is 10"9?A. 8B. 7C. 6D. 5

9. Th e concept of m olarity explainsA. the number of molecules in a solution.B. the sum of the weights of all atoms in a molecule.C. the number of moles of solute per liter of solution.D. the solution has higher concentration of hydroxide ions then hydrogen ions.

10. Types of linkages commonly found in polypeptides areA. peptide bonds.B. ester linkages.C. glycosidic linkages.D. disulphide bridges.

11 . The components of triacylglycerol areA. amino acids.B. glycerol an d fatty acids.C. ribose sugar and fatty acids.D. phosphate group, fatty acids and nitrogenous bases.

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12. Which of the following is considered as storage polysaccharide?A. ChitinB. CelluloseC. CollagenD. Glycogen

13 . An example of multicellular organism is theA. Amoeba sp .B. Euglena sp .C. Hibiscus sp .D. Paramecium sp.

14. The endomembrane system includesA. plasma membrane and mitochondrion.B. golgi apparatus and endoplasmic reticulum.C. mitochondrion an d chloroplast.D. nucleus and vacuole.

15. Strong digestive enzymes can be found insideA. lysosomes.B. ribosomes.C. mitochondria.D. endoplasmic reticulum.

16 . The membrane's specific function is mostly determined byA. proteins.B. cytoplasm.C. cholesterol.D. phospholipid bilayer.

17. Transportation of macromolecules is done by the process ofA. osmosis.B. diffusion.C. endocytosis.D. passive transport.

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18. The functions of plasma membrane include all of the following EXCEPTA. transportation.B. hormone regulation.C. cell to cell recognition.D. intercellular joining between adjacent cells.

19. The utilization of energy can be seen inA. osmosis.B. simple diffusion.C. facilitated diffusion.D. active transport.

20. Which is NOT the property of plasma membrane?A. AmphotericB. FluidityC. HydrophilicD. Hydrophobic

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CONFIDENTIAL AS/APR 2006/BIO120

PART B (70 MARKS)

QUESTION 1a) Briefly explain the following terms:

i) evolutionii) natural selection

b) Rewrite the following name of species according to the Binomial System.S P I R U L I N A M A J O R

QUESTION 2a) Consider the element below.

4018 Ar

(2 marks)(2 marks)

(2 marks)

i) Give the full name of the element.

ii) State its atomic weight and atomic number.iii) How many neutrons are contained in this element?

iv) Draw the element's electron configuration and illustrate its orbitals.

v) Could it react with the other element it encounters? Explain your answer.

(1 mark)

(2 marks)

(1 mark)

(4 marks)

(2 marks)

b) Briefly explain the reasons for the following phenomena based on the properties of water.

i) Small animals can walk on the water surface.

ii) Aquatic animals still survive during the winter season.

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QUESTION 3a) State THREE examples of cytoskeleton. (3 marks)b) Name TWO examples of organelles that consist of double membranous layer. (2 marks)c) Describe the structure and function of Golgi Apparatus. (5 marks)QUESTION 4a) With the help of a diagram, explain the process of simple diffusion. Then, give ONEexample of the process. (5 marks)b) With the help of a diagram, explain the process of exocytosis. (3 marks)c) What is the major difference between simple diffusion and exocytosis? (2 marks)

QUESTION 5a) Draw the formation of a disaccharide from two molecules of glucose. Circle the atoms ofthese glucose molecules that will be removed by a dehydration reaction. Then, name thelinkage and product formed at the end of the reaction. (7 marks)b) List THREE functions of carbohydrate. (3 marks)

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QUESTION 6An ecosystem is composed of living and non-living organisms that interact w ith each other toachieve an equilibrium system. The ecosystems are mostly powered by solar energy andthe energy flows among the organisms to maintain their survival. Organisms that act asproducers capture the solar energy and convert it into another form of energy. Then, theenergy is stored in the form of chemical energy and can be harvested by other organisms,called consumers. As the energy is being exchanged subsequently, some of them will bedissipated in the form of heat through the process of energy flow.By using an appropriate example, create an energy flow that exists in an ecosystem. Then,indicate the places where heat is dissipated to its surrounding. (6 marks)

QUESTION 7You are the head of research division of Superb Spinach Comp any. Your company isrunning an experiment on growing spinach using hydroponics technology. Hydroponicstechnology involves growing plants in containers of growth solution in a greenhouse. No soilis used. The growth solution that the company uses contains water, nitrogen, andphosphorus. The company wants to know if adding iron to this formula will improve thegrowth rate of spinach.a) State a hypothesis to be tested in the experiment.

(2 marks)b) Identify their dependent and independent variables. (2 marks)c) State how the control group will be treated differently from the experimental group.(4 marks)d) What type of data and unit of measurement should be collected to present the dependentvariables? (2 marks)e) If your hypothesis is not supported, assume a conclusion that can be derived at the endof the experiment. (2 marks)

END OF QUESTION PAPER

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bio120 apr 2006

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